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Nonrelativistic scale anomaly, and composite operators with complex scaling dimensions (1007.4635v2)
Published 27 Jul 2010 in hep-th, cond-mat.other, and nucl-th
Abstract: It is demonstrated that a nonrelativistic quantum scale anomaly manifests itself in the appearance of composite operators with complex scaling dimensions. In particular, we study nonrelativistic quantum mechanics with an inverse square potential and consider a composite s-wave operator O=\psi\psi. We analytically compute the scaling dimension of this operator and determine the propagator <0|T O O{\dagger}|0>. The operator O represents an infinite tower of bound states with a geometric energy spectrum. Operators with higher angular momenta are briefly discussed.
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